Hmmmm...You're better off Penis Enlargementing than trying to compare snake oils, or in this case snake tablets. There is some improvement in bloodflow over a short period of time, but I never saw anything permanent. My dad used Magna RX for a time and said that it helped his flaccid hang and getting "extra' hard wood, but he didn't ever mention any permanent size increases.
*My dad and I were talking about me Penis Enlargementing and he told me about the Magna RX and his experiences. He never has gotten into Penis Enlargement or looked into this very much, but that was about two years ago. Doesn't come up now, since he thinks I don't Penis Enlargement anymore.